added LINE beacon package (#725)

docs/packages.md

@@ -107,5 +107,9 @@
   "name": "Kittenbot RobotBit",
   "url":"/pkg/kittenbot/pxt-robotbit",
   "cardType": "package"
+  }, {
+  "name": "LINE BLE beacon",
+  "url":"/pkg/pizayanz/pxt-linebeacon",
+  "cardType": "package"
 }]
 ```

targetconfig.json

@@ -20,7 +20,8 @@
             "mbitfun/pxt-katakana",
             "jdarling/pxt-pca9685",
             "MUSELAB/pxt-wifi-shield",
-            "kittenbot/pxt-robotbit"
+            "kittenbot/pxt-robotbit",
+            "pizayanz/pxt-linebeacon"
         ],
         "preferredRepos": [
             "Microsoft/pxt-neopixel"
@@ -52,4 +53,4 @@
         "zh-CN",
         "zh-TW"
     ]
-}
+}